The global axis system is nearly exclusively used when entering frame geometry and loading. Sign conventions Frame input and output uses a mixture of global axis and local axes values. The following text explains the sign conventions used and gives a brief background of the analysis techniques. Space Trusses: Analysis of three-dimensional trusses where only axial forces are considered.įrame analysis results can be post-processed using the steel member design modules for axial and combined stress, namely Strut and Com. Space Frames: Analysis of three-dimensional structures made up of beam and/or shell elements and design of concrete shells. Grillages: Analysis of a structure in a horizontal (X-Z) plane. Plane Frames: Analysis of a frames in a vertical (X-Y) plane. The Space Frame Analysis module can also design finite shell elements as reinforced concrete members.įrame can be used for the analysis of the following types of structures by selecting a domain on the General input tab: Post-processing of analysis results Linear and second-order analysis output can be post-processed by the steel member design modules, Strut and Com, to evaluate and optimise section profiles. The module features an automated element grid generation facility to help speed up the input and analysis processes.īeam analysis Modules are available for the analysis of simple beams and beams on elastic supports. You can also use the Plane Stress/Strain Analysis module to perform a finite element analysis of any general plane geometry subjected to plane stress or strain. To model plate bending in concrete slabs, you may prefer using the Finite Element Slab Design see Chapter 6 for details. The shell elements enables you to model the combination of plate bending and membrane action in 3D. Harmonic analysis: For determining a frames response to harmonic loading.Įarthquake analysis: Quasi-dynamic analysis of a frame subjected to ground acceleration.įinite element analysis Frame allows you to use finite shell elements and solid elements alongside normal beam elements. Modal analysis: Calculation of a frames natural modes of vibration. Material non linearity is not yet supported.īuckling analysis: For calculating safety factors for structural instability due to buckling.ĭynamic analysis modes available include: The load is applied in steps and the deflected structure at the end of each step is used to apply the next step. This takes the second order analysis a bit further. The solution is obtained by iterative analysis, thereby allowing for options like tension elements. Second order analysis: Models sway behaviour by incorporating P-delta effects. Linear analysis: Normal elastic frame analysis. The following static analysis modes are available: Loads are entered as load cases and grouped in load combinations at ultimate and serviceability limit states. The input modules incorporate error checking to help eliminate input errors as they occur.įrame analysis Frame can take account of own weight, temperature changes, prescribed displacements and elastic supports. Frame has a comprehensive array of static and dynamic analysis modes.Įxtensive use is made of interactive graphic representations during both the input and output phases. The frame analysis module is ideally suited for the analysis of small to medium sized structures, not to say that the analyses of large structures are not possible. The accent of the analysis modules falls on user friendliness, speed and efficiency. Structural Analysis using PROKON 3-3 Frame Analysis 3-5 Plane Stress/Strain Analysis 3-78 Single Span Beam Analysis 3-78 Beam on Elastic Support Analysis 3-78 The structural analysis collection includes frame analysis and also some specialised finite element and beam analysis modules.